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Sam and Sarah lived in an old mill house in the Bride valley, but felt that driving into Bridport two or three times a day ws not sustainable, and decided to move into town. A Christian Science building had been vacant for 10 years, and they demolished it to build a house and two flats.
The building is made of structurally Insulated panels (SIPs) made of wood, and filled with sustainable wood fibre insulation (Pavaflex), with further (Steico) wood fibre boards on the outside. Part of the house is clad with Siberian Larch, the rest has a Baumit system lime render.The windows are triple glazed windows filled with inert gas. The house is near passivhaus standard, with an EPC efficiency rating of A (97).
This building is air-tight, with Mechanical Ventilation with Heat Recovery (MVHR) preheating the fresh air from the expelled stale air. The high level of insulation means little heating is required, but on very cold days
underfloor heating (UFH) and domestic hot water are heated by an Air Source Heat Pump (ASHP) on the roof. This extracts heat from the air outside. The house benefits from a Renewable Heat Incentive (RHI) for seven years to contribute to the price of the heat pump.
14 Photovoltaic (PV) solar panels produce up to 4.5lW, and charge up a 9.3 kWh battery on sunny days; any excess electricity is diverted to the Zappi electric car charger, to appliances and then to the grid. An export tariff of 5.2p per kWh is paid Solar thermal panels are also being considered for phase 2.